Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Notre-Dame-De-Lourdes tem qual área média em km²?
 ###Tabelas: CREATE TABLE negotiation_progress (negotiation_progress_id AUTO_INCREMENT PRIMARY KEY, Screening Started VARCHAR, Screening Completed VARCHAR, Chapter Unfrozen VARCHAR, Chapter Opened VARCHAR, Chapter Closed VARCHAR) CREATE TABLE most_viewed_channels (most_viewed_channels_id AUTO_INCREMENT PRIMARY KEY, Position INT, Channel VARCHAR, Launch date INT, Owner VARCHAR, 2005 VARCHAR, 2006 VARCHAR, 2007 VARCHAR, 2008 VARCHAR, 2009 VARCHAR, 2010 VARCHAR, 2011 VARCHAR, 2012 VARCHAR, 2013 (p) INT) CREATE TABLE the_field (the_field_id AUTO_INCREMENT PRIMARY KEY, Post INT, Horse name VARCHAR, Trainer VARCHAR, Jockey VARCHAR, Opening Odds VARCHAR, Starting Odds VARCHAR, Finishing Pos. INT) CREATE TABLE format_and_schedule (format_and_schedule_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Date(s) VARCHAR, Clubs from the previous round VARCHAR, Clubs involved INT, Fixtures INT) CREATE TABLE parishes (parishes_id AUTO_INCREMENT PRIMARY KEY, Official Name VARCHAR, Status VARCHAR, Area km 2 INT, Population INT, Census Ranking VARCHAR)  
SELECT AVG Area km 2 FROM parishes WHERE Official Name = notre-dame-de-lourdes